Help finding the shaded area

The hypotenuse of a 45 -45 -90 triangle measure 7 square root 2 units

What are the domain and range of the function f(x)=2^x+1

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6